some more crap emulated.

2025-07-23 14:19:55 -06:00 · 2016-12-06 17:32:51 +01:00
parent c8a0058ebc
commit 9bb3537ede
11 changed files with 532 additions and 61 deletions
--- a/Wifi.cpp
+++ b/Wifi.cpp
@ -0,0 +1,120 @@
+/*
+    Copyright 2016-2017 StapleButter
+
+    This file is part of melonDS.
+
+    melonDS is free software: you can redistribute it and/or modify it under
+    the terms of the GNU General Public License as published by the Free
+    Software Foundation, either version 3 of the License, or (at your option)
+    any later version.
+
+    melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include "NDS.h"
+#include "Wifi.h"
+
+
+namespace Wifi
+{
+
+u16 BBCnt;
+u8 BBWrite;
+u8 BBRegs[0x100];
+u8 BBRegsRO[0x100];
+
+
+void Reset()
+{
+    BBCnt = 0;
+    BBWrite = 0;
+    memset(BBRegs, 0, 0x100);
+    memset(BBRegsRO, 0, 0x100);
+
+    #define BBREG_FIXED(id, val)  BBRegs[id] = val; BBRegsRO[id] = 1;
+    BBREG_FIXED(0x00, 0x6D);
+    BBREG_FIXED(0x0D, 0x00);
+    BBREG_FIXED(0x0E, 0x00);
+    BBREG_FIXED(0x0F, 0x00);
+    BBREG_FIXED(0x10, 0x00);
+    BBREG_FIXED(0x11, 0x00);
+    BBREG_FIXED(0x12, 0x00);
+    BBREG_FIXED(0x16, 0x00);
+    BBREG_FIXED(0x17, 0x00);
+    BBREG_FIXED(0x18, 0x00);
+    BBREG_FIXED(0x19, 0x00);
+    BBREG_FIXED(0x1A, 0x00);
+    BBREG_FIXED(0x27, 0x00);
+    BBREG_FIXED(0x4D, 0x00); // 00 or BF
+    BBREG_FIXED(0x5D, 0x01);
+    BBREG_FIXED(0x5E, 0x00);
+    BBREG_FIXED(0x5F, 0x00);
+    BBREG_FIXED(0x60, 0x00);
+    BBREG_FIXED(0x61, 0x00);
+    BBREG_FIXED(0x64, 0xFF); // FF or 3F
+    BBREG_FIXED(0x66, 0x00);
+    for (int i = 0x69; i < 0x100; i++)
+    {
+        BBREG_FIXED(i, 0x00);
+    }
+    #undef BBREG_FIXED
+}
+
+
+u16 Read(u32 addr)
+{
+    addr &= 0x7FFF;
+
+    switch (addr)
+    {
+    case 0x158:
+        return BBCnt;
+
+    case 0x15C:
+        if ((BBCnt & 0xF000) != 0x6000)
+        {
+            printf("WIFI: bad BB read, CNT=%04X\n", BBCnt);
+            return 0;
+        }
+        return BBRegs[BBCnt & 0xFF];
+
+    case 0x15E:
+        return 0; // cheap
+    }
+
+    printf("WIFI: unknown read %08X\n", addr);
+    return 0;
+}
+
+void Write(u32 addr, u16 val)
+{
+    addr &= 0x7FFF;
+
+    switch (addr)
+    {
+    case 0x158:
+        BBCnt = val;
+        if ((BBCnt & 0xF000) == 0x5000)
+        {
+            u32 regid = BBCnt & 0xFF;
+            if (!BBRegsRO[regid])
+                BBRegs[regid] = val & 0xFF;
+        }
+        return;
+
+    case 0x15A:
+        BBWrite = val;
+        return;
+    }
+
+    printf("WIFI: unknown write %08X %04X\n", addr, val);
+}
+
+}